Comic Volodymyr Zelensky has won Ukraine's presidential runoff vote, defeating incumbent President Petro Poroshenko with 73.2 percent of the vote against 25.3, according to exit polls.

The ballots cast on Sunday were yet to be counted by Ukraine's Central Election Commission, but the exit polls coincided with the official results after the first round of elections which were held three weeks ago.

Poroshenko conceded defeat at a press conference minutes after the exit polls were announced>>>